netdev - [PATCH iwl-next v3 3/5] igb: drop unnecessary constant casts to u16

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <e16d5318-3e5c-4a4a-a629-ba221a5f04c5@jacekk.info>
Date: Wed, 23 Jul 2025 10:55:03 +0200
From: Jacek Kowalski <jacek@...ekk.info>
To: Tony Nguyen <anthony.l.nguyen@...el.com>,
 Przemek Kitszel <przemyslaw.kitszel@...el.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Simon Horman <horms@...nel.org>
Cc: intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org
Subject: [PATCH iwl-next v3 3/5] igb: drop unnecessary constant casts to u16

Remove unnecessary casts of constant values to u16.
C's integer promotion rules make them ints no matter what.

Additionally replace IGB_MNG_VLAN_NONE with resulting value
rather than casting -1 to u16.

Signed-off-by: Jacek Kowalski <jacek@...ekk.info>
Suggested-by: Simon Horman <horms@...nel.org>
---
 drivers/net/ethernet/intel/igb/e1000_82575.c | 4 ++--
 drivers/net/ethernet/intel/igb/e1000_i210.c  | 2 +-
 drivers/net/ethernet/intel/igb/e1000_nvm.c   | 4 ++--
 drivers/net/ethernet/intel/igb/igb.h         | 2 +-
 drivers/net/ethernet/intel/igb/igb_main.c    | 3 +--
 5 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/e1000_82575.c b/drivers/net/ethernet/intel/igb/e1000_82575.c
index 64dfc362d1dc..44a85ad749a4 100644
--- a/drivers/net/ethernet/intel/igb/e1000_82575.c
+++ b/drivers/net/ethernet/intel/igb/e1000_82575.c
@@ -2372,7 +2372,7 @@ static s32 igb_validate_nvm_checksum_with_offset(struct e1000_hw *hw,
 		checksum += nvm_data;
 	}
 
-	if (checksum != (u16) NVM_SUM) {
+	if (checksum != NVM_SUM) {
 		hw_dbg("NVM Checksum Invalid\n");
 		ret_val = -E1000_ERR_NVM;
 		goto out;
@@ -2406,7 +2406,7 @@ static s32 igb_update_nvm_checksum_with_offset(struct e1000_hw *hw, u16 offset)
 		}
 		checksum += nvm_data;
 	}
-	checksum = (u16) NVM_SUM - checksum;
+	checksum = NVM_SUM - checksum;
 	ret_val = hw->nvm.ops.write(hw, (NVM_CHECKSUM_REG + offset), 1,
 				&checksum);
 	if (ret_val)
diff --git a/drivers/net/ethernet/intel/igb/e1000_i210.c b/drivers/net/ethernet/intel/igb/e1000_i210.c
index 503b239868e8..9db29b231d6a 100644
--- a/drivers/net/ethernet/intel/igb/e1000_i210.c
+++ b/drivers/net/ethernet/intel/igb/e1000_i210.c
@@ -602,7 +602,7 @@ static s32 igb_update_nvm_checksum_i210(struct e1000_hw *hw)
 			}
 			checksum += nvm_data;
 		}
-		checksum = (u16) NVM_SUM - checksum;
+		checksum = NVM_SUM - checksum;
 		ret_val = igb_write_nvm_srwr(hw, NVM_CHECKSUM_REG, 1,
 						&checksum);
 		if (ret_val) {
diff --git a/drivers/net/ethernet/intel/igb/e1000_nvm.c b/drivers/net/ethernet/intel/igb/e1000_nvm.c
index 2dcd64d6dec3..c8638502c2be 100644
--- a/drivers/net/ethernet/intel/igb/e1000_nvm.c
+++ b/drivers/net/ethernet/intel/igb/e1000_nvm.c
@@ -636,7 +636,7 @@ s32 igb_validate_nvm_checksum(struct e1000_hw *hw)
 		checksum += nvm_data;
 	}
 
-	if (checksum != (u16) NVM_SUM) {
+	if (checksum != NVM_SUM) {
 		hw_dbg("NVM Checksum Invalid\n");
 		ret_val = -E1000_ERR_NVM;
 		goto out;
@@ -668,7 +668,7 @@ s32 igb_update_nvm_checksum(struct e1000_hw *hw)
 		}
 		checksum += nvm_data;
 	}
-	checksum = (u16) NVM_SUM - checksum;
+	checksum = NVM_SUM - checksum;
 	ret_val = hw->nvm.ops.write(hw, NVM_CHECKSUM_REG, 1, &checksum);
 	if (ret_val)
 		hw_dbg("NVM Write Error while updating checksum.\n");
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index c3f4f7cd264e..0fff1df81b7b 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -217,7 +217,7 @@ static inline int igb_skb_pad(void)
 #define IGB_MASTER_SLAVE	e1000_ms_hw_default
 #endif
 
-#define IGB_MNG_VLAN_NONE	-1
+#define IGB_MNG_VLAN_NONE	0xFFFF
 
 enum igb_tx_flags {
 	/* cmd_type flags */
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index a9a7a94ae61e..5e63d7f6a568 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -1531,8 +1531,7 @@ static void igb_update_mng_vlan(struct igb_adapter *adapter)
 		adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
 	}
 
-	if ((old_vid != (u16)IGB_MNG_VLAN_NONE) &&
-	    (vid != old_vid) &&
+	if (old_vid != IGB_MNG_VLAN_NONE && vid != old_vid &&
 	    !test_bit(old_vid, adapter->active_vlans)) {
 		/* remove VID from filter table */
 		igb_vfta_set(hw, vid, pf_id, false, true);
-- 
2.47.2